Heat exchanger assembly



FIG. 1 is a bottom front perspective view of a heat exchanger assembly, showing our design;

FIG. 2 is a front elevational plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side view thereof, the left side view being a mirror image of the right side view;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

CLAIM The ornamental design for a heat exchanger assembly, as shown and described. 